Geely EC718 2009 Workshop Manual page 160

2-78 Control System JL4G18-D
4. Diagnostic Steps:
Note
Before carrying out this diagnosis step, observe the data list on scan tool and analyze the accuracy of the data, as
these will help with quick diagnosis.
Check valve timing system.
Step 1
Yes
Step 2 Check ECM power supply circuit.
Yes
Step 3 Replace ECM.
Note
Use of Lubrication system cleaner is not recommended. Such cleaning agents contain strong solvent and may have
side effects on seals and other engine components.
Step 4 Adjust and repair the mechanical timing system.
Next
Use scan tool to confirm whether the DTC code is stored again.
Step 5
EC718/EC718RV EC715/EC715RV 10/2009
(a) Check whether camshaft, crankshaft and timing chain is
correct.
(b) Check whether timing chain tensioning force is normal.
Go to step 4
No
(a) Check whether ECM power supply circuit is normal.
(b) Check whether ECM ground circuit is normal.
Repair the faulty part.
No
Go to step 5
Next
(a) Read the vehicle service records and identify whether recent
services included the timing chain, camshaft or crankshaft,
and whether engine oil change intervals are too long.
(b) If the engine oil is contaminated or contains impurities, the
reasons should be identified. Remove timing chain, camshaft
position actuators and the sprocket. Refer to
Chain Replacement. Remove VVT solenoid valve that filters
the engine oil provided to the intake camshaft actuator. Refer
to 2.2.8.4 VVT Solenoid Valve Replacement and Filter
Cleaning. Check filters and oil channel whether there are
impurities. Clean filters and replace the filter if necessary.
(c) If the engine oil pressure is too low, identify causes and carry
out necessary repairs.
(a) Connect scan tool to the datalink connector.
(b) Turn the ignition switch to "ON" position.
Engine
2.6.8.10 Timing